Item SpecificsSpecification:COMPATIBLE MODELS This grill knobs fit for most gas grills with D-shape protruding valve stem.Comes with two different size adapters to fit different valve stems, can widely used for weber grill, kitchen cooker, gas stove, oven, electric cooker, etc.PACKAGE INCLUDES This grill knobs replacement package includes four knobs, four 6mm adapters and four 8mm adapters. Great for you to replace the damaged one for your gas stove cooker.NOTE: Make sure you put the correct sizing in the middle of the shaft, and position the off arrow correctly prior to pushing the knob on to the shaft, as they are hard to pull off if in the wrong place with the initial installation.Package includes:4pcs of Control Knobs